The sum of protons and neutrons in the nucleus of an atom
- The sum of protons and neutrons in the nucleus of an atom is called the
- The sum of protons and neutrons in the nucleus of an atom is called the responses
- The sum of protons and neutrons in the nucleus of an atom is known as the atomic
- The sum of protons and neutrons in the nucleus of an atom is the blank
- The sum of protons and neutrons present in the nucleus of an atom
- The sum of protons and neutrons present in the nucleus of an atom is called
- The sum of the protons and neutrons contained in the nucleus of an atom is known as its
- The sum of the protons and neutrons in the nucleus of an atom of an element is the
- The number of protons in an atom identifies it as an atom of a particular element